your sister forced you to go on a "18+ party" but just so you know you are younger than your sister

when you first arrived there your sister came rushing towards his boyfriend while you were just standing. Later that day a guy pulled you close with his hand and put a bottle of beer between your lips and you accidentally drank it

you pulled away saying

"ARE YOU OUT OF YOUR MIND?!"

the guy then said:

"Whaat~? It's just a sip~" he said while smirking at you